If you have Alexa in your house, I'm not saying certain people might be listening in but (adjusts tin-foil hat)
Of course they are listening. The Alexa people said so.
Read an article once where the Alexa operators described some of the extreme stuff they hear.
Most of it was disgusting. Everything from weird sex, to bathroom noises, to child abuse.
The funniest Alexa story to me, was the commercial that would broadcast loudly, "Alexa! Order (product name) now!"
Obviously it was shut down very quickly. But it did work. Alexa ordered it.